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Pennisetum purpureum Schum. has been a key alternative as an energy source in Brazil because of its higher dry matter accumulation and fiber content. This research aimed to select superior individuals of P. purpureum for energy purposes using among-and-within family selection. The study was carried out in Campos dos Goytacazes- RJ (Brazil), using eight full-sib families. Plants were individually assessed during two pasture cuttings, one in 2014, and another in 2015. The dry matter production (DMP) was correlated with the number of tillers, stem diameter, plant height, and neutral detergent fiber content. Plant selection criteria in both cuts were through direct and indirect selections, and Smith and Hazel index. A joint analysis of variance showed significant differences for all five traits assessed in both cuts. The results achieved with Smith and Hazel index were promising for simultaneous selection of the evaluated traits, favoring selection of superior families and individuals them.

The elephant-grass undergoes successive cutting and periodical evaluations that it possible to identify clones with high stability for dry matter production, which can be used for energy production. The present study was carried out to evaluate stability dry matter yield for different parametric and non-parametric methods in elephant grass genotypes for biomass production undergoes successive cutting in the agroclimatic conditions of the Norte Fluminense (RJ, Brazil). The variable measured in the 40 genotypes was dry matter yield (DMY) at 2009, 2010 and 2011 in a field study designed as randomized block design with two replicates. Each sample was grown in different environment condition. The stability methods tested were the Yates and Cochran’s, Plaisted and Peterson’s, Wricke’s ecovalence, Annicchiarico’s, Lin and Binns’ and Kang and Phan’s. Results indicated that cutting (E) and genotypes (G) influenced significantly on the performance of dry matter yield. The non-parametric stability methods were effective for the evaluation of stability in dry matter yield. Genotypes Mercker, Pinda-México, Mercker 86-México, Guaçu/IZ, Mercker Pinda, P-241-Piracicaba and Cubano Pinda were stable stability dry matter yield. Hence, there are genotypes may be exploited in future breeding programmes in order to improve productivity of upland elephant grass over environment. RESUMO O capim-elefante sofre sucessivos cortes em avaliações periódicas, possibilitando identificar clones com alta estabilidade para a produção de matéria seca, podendo ser utilizados para a produção de energia. O presente estudo foi realizado para avaliar a estabilidade na produção de matéria seca, considerando métodos paramétricos e não paramétricos, em genótipos de capim-elefante para produção de biomassa submetido a cortes sucessivos nas condições climáticas do Norte Fluminense (RJ, Brasil). A variável medida nos 40 genótipos foi a produção de matéria seca (DMY) em 2009, 2010 e 2011 em um experimento de campo em blocos casualizados com duas repetições. Cada amostra foi cultivada em diferentes condições ambientais. Os métodos de estabilidade testados foram de Yates e Cochran, Plaisted e Peterson, Wricke, Annicchiarico, Lin e Binns e Kang e Phan. Os resultados indicaram que o corte (E) e os genótipos (G) influenciaram significativamente no desempenho para a produção de matéria seca. Os métodos de estabilidade não-paramétrica foram eficientes para a avaliação da estabilidade no rendimento da matéria seca. Os genótipos Mercker, Pinda-México, Mercker 86-México, Guaçu/IZ, Mercker Pinda, P-241-Piracicaba e Cubano Pinda tiveram uma estabilidade estável na produção de matéria seca. Por conseguinte, existem genótipos que podem ser explorados em futuros programas de melhoramento, a fim de melhorar a produtividade de capim elefante no ambiente.

The aim of this study was to evaluate the Per se performance of elephant grass hybrids obtained by partial diallel crossing and also their parents for energy purposes through agronomic traits during rainy and dry seasons. The experiment was conducted at Pesagro experimental station, Campos dos Goytacazes, RJ, Brazil, in randomized blocks, with three repetitions. The crosses were made between contrasting parents in a partial diallel scheme with 5 female parents x 5 male parents. The treatments consisted of ten parents, twenty-five hybrid combinations and the control. Three cuts were realized for evaluations (April and October 2013 and April 2014). The characteristics evaluated were: plant height (ALT), in m; stem diameter (SD), in cm; leaf blade width (LB), in cm; number of tillers per linear meter (NP); dry matter percentage (%DM) and dry matter production (DMP), in t.ha-1. Variance analysis were performed and the means were grouped according to Scott-Knott test (P, O objetivo deste estudo foi avaliar o comportamento Per se de híbridos de capim-elefante obtidos em esquema de cruzamento em dialelo parcial e seus genitores para fins energéticos por meio de características morfoagronômicas nas estações chuvosa e seca. O experimento foi conduzido na estação experimental da Pesagro-RJ, em Campos dos Goytacazes, em delineamento em blocos ao acaso, com três repetições. Os cruzamentos foram obtidos entre genitores contrastantes em esquema de dialelo parcial 5 (genitores femininos) x 5 (genitores masculinos). Os tratamentos foram os dez genitores, as vinte e cinco combinações híbridas e uma testemunha. Foram efetuados três cortes de avaliações (abril e outubro de 2013 e abril de 2014). As características avaliadas foram: altura das plantas (ALT), em m; diâmetro do colmo (DC), em cm; largura da lâmina foliar (LL), em cm; número de perfilhos por metro linear (NP); porcentagem de matéria seca (%MS) e produção de matéria seca (PMS), em t.ha-1. Foram realizadas as análises de variância e agrupamentos das médias pelo teste de Scott-Knott (P

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2020-10-21T12:59:03Z No. of bitstreams: 1 2011 - Bruna Rafaela da Silva Menezes.pdf: 2030910 bytes, checksum: 64b29cc94dc46f379880834570a3ef23 (MD5) Made available in DSpace on 2020-10-21T12:59:03Z (GMT). No. of bitstreams: 1 2011 - Bruna Rafaela da Silva Menezes.pdf: 2030910 bytes, checksum: 64b29cc94dc46f379880834570a3ef23 (MD5) Previous issue date: 2011-02-18 Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil. Red rice is known as a weed in rice fields blank. It is grown by small farmers in areas of the Northeast and N orthern Minas Gerais ( Brazil). Despite having such features as lar ge size, greater susceptibility to lodging, longer duration of seed dormancy after harvest have been observed genotypes of red rice with traits similar to white rice cultivars. Thus, the objectives were to compare the morphological and agronomics traits of rice genotypes of red with white rice recommended for cultivation i n flood irrigation and dry , quality and physiological dormancy in two periods of storage, and combined , determine the point of physiological maturity of seeds in irrigated crop. The experi ment was installed in the experimental field of Depart a ment o de Fitotecnia UFRRJ in 2009. To the evaluation of morphological and agronomics traits was used a randomized block design with five replications. In the case of quality and physiological dormancy was used factorial 4 (genotypes) x 3 (1 control and 2 treatments of dormancy) in randomized blocks with five replications. After A nalysis of variance at each time of storage was performed overall data analysis. Means were compared by Student Newman Keuls t est at 5% probability. To determine the physiological maturity point was used a randomized blocks in split plots. After analysis of variance was performed regression analysis for the traits of water content and dry matter. It was observed that the red rice genotypes had lower yield compared to white rice recommended for cultivation under flooded conditions. Already in upland conditions the genotype ?Vermelho Virg? nia showed higher productivity although not significant differences between treatments. In both culture conditions the red rice genotypes had lower length of caryopsis. In the case of genotype ?Vermelho Virginia?, the caryopsis was thicker and the plant was larger compared with the genotypes of white rice. The genotype ?Vermelho Pequeno? had lost dormancy after 30 days of storage while genotypes ?Vermelho Virginia?, ?EPAGRI109? and ?SCSBRS Tio Taka? showed the loss of dormancy only after 60 days of storage. It was found that the point of physiological maturity was reached at 25 days after the flower ing period when the seeds were the maximum accumulation of dry matter. The g enotypes ?Vermelho Virg? nia ? and ?Vermelho Pequeno? have potential to be used in breeding programs aimed at obtaining new cultivars. O arroz vermelho ? conhecido como uma invasora em lavouras de arroz branco. ? cultivado por pequenos agricultores em ?reas da Regi?o Nordeste e do Norte de Minas Gerais. Apesar de possuir caracter?sticas como porte elevado, maior susceptibilidade ao acamamento, maior dura??o da dorm?ncia das sementes ap? s a colheita, j? foram observado s gen?tipos de arroz vermelho com caracter?sticas s emelhantes a cultivares de arroz branco. Com isso, os objetivos deste trabalho foram comparar as caracter?sticas morfoagron?micas de gen?tipos de arroz vermelho com de arroz branco recomendados para o cultivo em condi??es de irriga??o por inunda??o e em se queiro, a qualidade fisiol?gica e a dorm?ncia de sementes em duas ?pocas de armazenamento, aliado a isto, determinar o ponto de maturidade fisiol?gica, das sementes na cultura irrigada. O s experimento s foram instalado s no campo experimental do Departamento de Fitotecnia da UFRRJ no ano de 2009. Para a avalia??o das caracter?sticas morfoagron?micas foi utilizado o delineamento em blocos ao acaso com cinco repeti??es. No caso da qualidade fisiol?gica e dorm?ncia foi utilizado o fatorial 4 (gen?tipos) x 3 (1 c ontrole e 2 tratamentos de quebra de dorm?ncia) no delineamento em blocos ao acaso com cinco repeti??es. Ap?s a an?lise da vari?ncia em cada ?poca de armazenamento foi realizada a an?lise conjunta dos dados. As m?dias foram comparadas pelo teste de Student Newman Keuls a 5% de probabilidade. Para a determina??o do ponto de maturidade fisiol?gica foi utilizado o delineamento em blocos ao acaso em parcelas subdivididas. Ap?s a an?lise da vari?ncia foi realizada a an?lise de regress?o para as caracter?sticas t eor de ?gua e massa de mat?ria seca. Foi observado que os gen?tipos de arroz vermelho obtiveram menor produ??o em compara??o com os de arroz branco recomendados para o cultivo irrigado por inunda??o. J? nas condi??es de sequeiro o gen?tipo Vermelho Virg?ni a apresentou maior produtividade apesar de n?o serem detectadas diferen?as significativas entre os tratamentos. Nas duas condi??es de cultivo os gen?tipos de arroz vermelho apresentaram menor comprimento do cariopse. N o caso do gen?tipo Vermelho Virg?nia, o cariopse teve maior espessura e a planta teve maior p orte em compara??o com os gen?tipos de arroz branco. O gen?tipo Vermelho Pequeno apresentou perda de dorm?ncia aos 30 dias de armazenamento e nquanto o s gen?tipos Vermelho Virg?nia, EPAGRI109 e SCSBRS Tio Taka apresentaram a perda da dorm?ncia somente aos 60 dias de armazenamento. Verificou se que o ponto de maturidade fisiol?gica foi atingido aos 25 dias ap?s a flora??o m?dia quando as sementes apresentaram o m?ximo ac?mulo de massa de mat?ria seca. Os gen?tipos Vermelho Pequeno e Vermelho Virg?nia possuem potencial para serem utilizados em programas de melhoramento visando a obten??o de novas cultivares de arroz.

Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2022-06-08T15:15:31Z No. of bitstreams: 1 2019 - Gustavo Torres Dos Santos Amorim.pdf: 4496184 bytes, checksum: 97c5d949fe3471296b9348cded51297a (MD5) Made available in DSpace on 2022-06-08T15:15:31Z (GMT). No. of bitstreams: 1 2019 - Gustavo Torres Dos Santos Amorim.pdf: 4496184 bytes, checksum: 97c5d949fe3471296b9348cded51297a (MD5) Previous issue date: 2019-07-30 CAPES - Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior The periwinkle (Catharanthus roseus [L.] G. Don) is distinguished because it is exclusive source of vincristine and vinblastine alkaloids, however they occur in low concentrations in the species. Such alkaloids are used in chemotherapy for the treatment of tumors, leukemias and lymphomas. Therefore, it is essential to develop a breeding program in search of superior genotypes for vincristine and vinblastine production. For this, it is necessary, initially, the study of the preferential reproduction mode of the species for the correct application of the breeding methods. Given the above, this research aimed to study the preferential mode of reproduction in 10 genotypes of periwinkle from the germplasm collection of the Federal Rural University of Rio de Janeiro, based on the pollen:ovule (P:O) ratio, histochemical pollen, emission and development of pollen tubes in vivo, pollen viability and receptivity of stigma. As well as to estimate genetic diversity using ISSR molecular markers (Inter Simple Sequence Repeats) among the analyzed genotypes. To estimate the ratio (P:O), anthers of each flower were excised, and pollen grains were counted under a microscope; ovaries of the same flowers were dissected, and the ovules were counted under stereomicroscope. In the histochemical analysis of pollen grains were used the dyes Sudan IV and the solution I2KI for the detection of lipid and starch, respectively. The emission and development of pollen tubes in vivo were evaluated in flower buds and flowers in anthesis, under fluorescence microscopy, using 0.1% aniline blue fluorochrome. For the pollen viability, in flower buds, the triple solution of Alexander was used and for the receptivity of the stigma was adopted the solution of alpha-naphthyl acetate, in closed flowers and anthesis. In the genotypic analysis, 15 ISSR primers were used. The phenetic matrix was estimated by dissimilarity index of Jaccard and the grouping of the genotypes was performed by UPGMA (Unweighted Pair Groups Method with Arithmetic Mean). The consistency of the clustering pattern was verified through the cophenetic correlation. The results of the ratio (P:O) indicated that eight of the 10 genotypes presented both facultative self-pollinated and facultative cross pollinated (mixed mating). However, two genotypes presented only one mode of reproduction, facultative cross pollinated, in UFRRJ VIN007, and facultative self-pollinated in UFRRJ VIN004. The receptive stigmas and the high pollen viability in flower buds established favorable conditions for the occurrence of cleistogamy. Based on the emission and development of pollen tubes in vivo, it was verified that of the eight genotypres with mixed reproduction mode, six of them had a strong tendency to allogamy and all were self-compatible. It was also verified the occurrence of cleistogamy in 50% of the genotypes. In the case of UFRRJ VIN004 such occurrence was accentuated, which reinforces its tendency to autogamy. However, it was observed that seven genotypes, including UFRRJ VIN007, showed a strong tendency to allogamy. In view of this, a great diversity of reproductive strategies can be observed in periwinkle, since both self-pollinated and allogamy may be present. The high genetic diversity obtained can be explained by the strong tendency to allogamy found in 70% of the analyzed genotypes A vinca (Catharanthus roseus [L.] G. Don) distingue-se por ser fonte exclusiva dos alcaloides vincristina e vimblastina, no entanto ocorrem em baixas concentra??es na esp?cie. Tais alcaloides s?o utilizados em quimioter?picos para o tratamento de tumores, leucemias e linfomas. Sendo assim, ? fundamental desenvolver um programa de melhoramento gen?tico na busca de gen?tipos superiores quanto a produ??o de vincristina e vimblastina. Para isso, ? necess?rio, inicialmente, o estudo do modo de reprodu??o preferencial da esp?cie para a aplica??o correta dos m?todos de melhoramento. Diante do exposto, esta pesquisa teve como objetivo estudar o modo de reprodu??o preferencial em 10 gen?tipos de vinca da cole??o de germoplasma da Universidade Federal Rural do Rio de Janeiro, com base na rela??o p?len:?vulo (P:O), histoqu?mica dos gr?os de p?len, emiss?o e desenvolvimento de tubos pol?nicos in vivo, viabilidade pol?nica e receptividade do estigma. Bem como estimar a diversidade gen?tica via marcadores moleculares ISSR (Inter Simple Sequence Repeats) entre os gen?tipos analisados. Para estimar a raz?o (P:O), anteras de cada flor foram excisadas, e os gr?os de p?len foram contados sob microsc?pio; ov?rios das mesmas flores foram dissecados, e os ?vulos foram contados sob estereomicrosc?pio. Na an?lise histoqu?mica dos gr?os de p?len utilizou-se os corantes Sudan IV e a solu??o de I2KI para detec??o de lip?deo e amido, respectivamente. A emiss?o e desenvolvimento de tubos pol?nicos in vivo foram avaliados em bot?es florais e flores na antese, em microscopia de fluoresc?ncia, utilizando-se o fluorocromo azul de anilina a 0,1%. Para a viabilidade pol?nica, em bot?es florais, empregou-se a solu??o tripla de Alexander e para a receptividade do estigma adotou-se a solu??o de acetato de alfa-naftil, em flores fechadas e na antese. Na an?lise genot?pica foram utilizados 15 primers ISSR. A matriz fen?tica foi estimada pelo ?ndice de dissimilaridade de Jaccard e o agrupamento dos gen?tipos foi realizado via UPGMA (Unweighted Pair Groups Method with Arithmetic Mean). Verificou-se a consist?ncia do padr?o de agrupamento atrav?s da correla??o cofen?tica. Os resultados da rela??o (P:O) indicaram que oito, dos 10 gen?tipos, apresentaram, simultaneamente, autogamia facultativa e alogamia facultativa (modo de reprodu??o misto). Por?m, dois gen?tipos apresentaram somente um modo de reprodu??o, al?gamo facultativo, no UFRRJ VIN007, e aut?gamo facultativo no UFRRJ VIN004. Os estigmas receptivos e a elevada viabilidade pol?nica em bot?es florais estabeleceram condi??es favor?veis para a ocorr?ncia da cleistogamia. Com base na emiss?o e desenvolvimento de tubos pol?nicos in vivo, constatou-se que dos oito gen?tipos com modo de reprodu??o misto, seis deles tiveram forte tend?ncia a alogamia e todos foram autocompat?veis. Verificou-se tamb?m a ocorr?ncia da cleistogamia em 50% dos gen?tipos. No caso, do UFRRJ VIN004 tal ocorr?ncia foi acentuada, o que refor?a a sua tend?ncia a autogamia. Entretanto, observou-se que sete gen?tipos, incluindo o UFRRJ VIN007, exibiram forte tend?ncia a alogamia. Diante disso, percebe-se grande diversidade de estrat?gias reprodutivas em vinca, j? que tanto a autofecunda??o quanto a alogamia podem estar presentes. A alta diversidade gen?tica obtida pode ser explicada pela forte tend?ncia a alogamia constatada em 70% dos gen?tipos analisados

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2022-02-14T20:08:19Z No. of bitstreams: 1 2019 - Rafael Hydalgo Passeri Lima.pdf: 1458824 bytes, checksum: 55fc812f9e51aba5c140ad53a88947be (MD5) Made available in DSpace on 2022-02-14T20:08:19Z (GMT). No. of bitstreams: 1 2019 - Rafael Hydalgo Passeri Lima.pdf: 1458824 bytes, checksum: 55fc812f9e51aba5c140ad53a88947be (MD5) Previous issue date: 2019-03-21 CAPES - Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior Red rice is a special type of rice in which the grains have the reddish-colored pericarp that occurs due to the presence of a dominant character that is controlled by the Rd gene on chromosome 1 and Rc on chromosome 7 when these genes are present together Rc_Rd_) there is red grain production. Red rice has greater added value and, consequently, greater market value when compared to white rice, mainly due to its functional characteristics, such as high antioxidant content. A red rice cultivar capable of presenting great productivity, together with the high market value of this product, suggests that this crop may appear as an alternative production for producers who do not have large areas and who need to add value to their production, seeking to increase their productivity income. Research on the cultivation of red rice is still scarce, there is a need to expand the study of the adaptability and stability of the existing red rice strains in order to launch new cultivars, in order to make possible the recommendation of this cultivation for different regions and different production systems. The objective of this study was to morphologically describe two cultivars of red rice and to evaluate their respective agronomic behaviors, comparing them to two cultivars of white rice, in three locations and two consecutive years, in the state of Rio de Janeiro. The experiments were carried out during the agricultural years of 2016/2017 and 2017/2018 in the municipalities of Campos dos Goytacazes, Serop?dica and Pinheiral, and were conducted in a rainfed system, with supplementary irrigation, and under organic production management. The morphological characteristics were evaluated: flag feaf angle, leaf color, stem length, presence of edges, panicle length, apiculus color, glumelle color, grain length and grain shape; and the following agronomic characteristics: viable panicles per square meter, panicle spikelets, spikelet fertility, 100 spikelet weight, yield, stem length, panicle length, plant height, cultural cycle and mean flowering; in addition, the classification of the grain and the milling yield and whole grains were evaluated. The experimental design was a randomized block design, with four treatments and five replications. The treatments were registered cultivars of white rice, BRS Esmeralda and IAC 201 and the traditional cultivars of red rice, ENA-AR1601 and Virginia. The data were submitted to analysis of variance, individual for each location and year, the means were compared by the Tukey test (p

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2021-05-24T19:21:23Z No. of bitstreams: 1 2018 - Diogo de Vilela Marinho.pdf: 2358203 bytes, checksum: b2a8654ec9f74b03c3ea93f839a00809 (MD5) Made available in DSpace on 2021-05-24T19:21:23Z (GMT). No. of bitstreams: 1 2018 - Diogo de Vilela Marinho.pdf: 2358203 bytes, checksum: b2a8654ec9f74b03c3ea93f839a00809 (MD5) Previous issue date: 2018-12-13 Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico, CNPq, Brasil. Breeding programs are of great importance for modern agriculture and for the sustainable increase of agricultural production. However, in the case of cherry tomatoes (Solanum lycopersicum var. Cerasiforme), there is still a lack of data and studies in the literature that are sufficient to satisfactorily subsidize breeding or genetic studies on this crop. The present study had as objectives: to study the heritability of agronomic characteristics in populations P1, P2, F1, F2, F3 and F4 of Solanum lycopersicum var. cerasiforme obtained with the crossing of cultivars ENAS 1125 X PERINHA ?GUA BRANCA of Cherry Tomato; to estimate genetic parameters for agronomic and productive characteristics to guide the best choice in breeding methods to obtain pure lines with market potential. The experiments were conducted under field conditions between November 2016 and September 2018, at the Vegetation House in the Large Crops Sector of the Agronomy Institute and at the Experimental Field of the Institute of Agronomy - Department of Plant Science - UFRRJ. The design, in both experiments, was in randomized blocks (DBC), following the recommendation of the literature to conduct the culture. The characteristics evaluated in the first experiment were: average weight of the fruits (grams), average weight of the bunches (grams), total production per plant (kg), number of fruits (units) and soluble solids content (?Brix). It was found complete dominance only in the characteristic soluble solids content, absence of dominance for number of fruits and over-dominance for average fruit weight, total production per plant and average weight of the bunches. The heritability estimates in the broad sense presented 58% for average fruit weight, 66% for total production per plant, 33% for average weight of bunches, 67% for fruit number and 75% for soluble solids content. The heritabilities in the restricted sense were estimated in 23% for average fruit weight, 3% for total production per plant, 2% for average weight of bunches, 0% for fruit number and 53% for soluble solids content. In the second experiment, the average weight of fruits (grams), total production per plant (kg) and number of fruits (units) were evaluated. Estimates of heritability in the approximate restricted sense presented values of 14% for total number of fruits, 30% for total production and 40% for average fruit weight. Thus, the characteristics of average fruit weight, total yield per plant and average weight of the bunches showed that they are inheritable characteristics and indicated for the breeding of the cultivars ENAS 1125 X PERINHA ?GUA BRANCA of cherry tomatoes. This study was financed in part by the Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Brasil (CAPES) - Finance Code 001. Programas de melhoramento s?o de grande import?ncia para agricultura moderna e para o aumento sustent?vel da produ??o agr?cola. Contudo, se tratando de tomate-cereja (Solanum lycopersicum var. cerasiforme), ainda carece de dados e estudos na literatura, que sejam suficientes para subsidiar, de maneira satisfat?ria, o melhoramento ou estudos gen?ticos sobre essa cultura. O presente estudo teve como objetivos: estudar a herdabilidade de caracter?sticas agron?micas em popula??es P1, P2, F1, F2, F3 e F4 de Solanum lycopersicum var. cerasiforme obtidos com o cruzamento dos cultivares ENAS 1125 X PERINHA ?GUA BRANCA de Tomate Cereja; estimar par?metros gen?ticos para caracteres agron?micos e produtivos para orientar a melhor escolha em m?todos de condu??o de melhoramento, para obten??o de linhas puras com potencial de mercado. Os experimentos foram conduzidos em condi??es de campo entre os meses de novembro de 2016 e setembro de 2018, na Casa de Vegeta??o no Setor de Grandes Culturas do Instituto de Agronomia e no Campo Experimental do Instituto de Agronomia ? Departamento de Fitotecnia ? UFRRJ. O delineamento, nos dois experimentos, foi em blocos casualizados (DBC), seguindo a recomenda??o da literatura para condu??o da cultura. As caracter?sticas avaliadas no primeiro experimento foram: peso m?dio dos frutos (gramas), peso m?dio dos cachos (gramas), produ??o total por planta (Kg), n?mero de frutos (unidades) e teor de s?lidos sol?veis (?Brix). Constatou-se domin?ncia completa apenas na caracter?stica teor de s?lidos sol?veis, aus?ncia de Domin?ncia para n?mero de frutos e sobre-domin?ncia para peso m?dio de frutos, produ??o total por planta e peso m?dio dos cachos. As estimativas da herdabilidade no sentido amplo apresentou 58% para peso m?dio dos frutos, 66% para produ??o total por planta, 33% para peso m?dio dos cachos, 67% para n?mero de frutos e 75% para teor de s?lidos sol?veis. As herdabilidades no sentido restrito foram estimadas em 23% para peso m?dio dos frutos, 3% para produ??o total por planta, 2% para peso m?dio dos cachos, 0% para n?mero de frutos e 53% para teor de s?lidos sol?veis. No segundo experimento foram avaliadas as caracter?sticas peso m?dio dos frutos (gramas), produ??o total por planta (Kg) e n?mero de frutos (unidades). As estimativas da herdabilidade no sentido restrito aproximada apresentou valores de 14% para n?mero total de frutos, 30% para produ??o total e 40% para peso m?dio dos frutos. Assim, as caracter?sticas de peso m?dio dos frutos, produ??o total por planta e peso m?dio dos cachos demostraram que s?o caracter?sticas herd?veis e indicadas para realiza??o do melhoramento no cruzamento das cultivares ENAS 1125 X PERINHA ?GUA BRANCA de tomate cereja. O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - Brasil (CAPES) - C?digo de Financiamento 001.